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Call Web Service Dynamically

, 17 Jan 2010 CPOL
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Confused | :confused: Confused | :confused: Confused | :confused: I found a way after searching the web to invoke a webservice thru code without having to set a web reference.

internal class WsProxy { [SecurityPermissionAttribute(SecurityAction.Demand, Unrestricted = true)]
internal static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args)
System.Net.WebClient client = new System.Net.WebClient();
//-Connect To the web service
System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl");
//--Now read the WSDL file describing a // service.
ServiceDescription description = ServiceDescription.Read(stream);
///// LOAD THE DOM /////////
//--Initialize a service description imp // orter.
ServiceDescriptionImporter importer = new ServiceDescriptionImporter();
importer.ProtocolName = "Soap12"; // Use SOAP 1.2.
importer.AddServiceDescription(description, null, null);
//--Generate a proxy client. importer.Style = ServiceDescriptionImportStyle.Client;
//--Generate properties to represent pri // mitive values.
importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties;
//--Initialize a Code-DOM tree into whic // h we will import the service.
CodeNamespace nmspace = new CodeNamespace();
CodeCompileUnit unit1 = new CodeCompileUnit();
//--Import the service into the Code-DOM // tree. This creates proxy code
//--that uses the service.
ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1);
if (warning == 0) //--If zero then we are good to go
//--Generate the proxy code CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp");
//--Compile the assembly proxy with the // appropriate references
string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" };
CompilerParameters parms = new CompilerParameters(assemblyReferences);
CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1);
//-Check For Errors
if (results.Errors.Count > 0)
foreach (CompilerError oops in results.Errors)
System.Diagnostics.Debug.WriteLine("========Compiler error============");
throw new System.Exception("Compile Error Occured calling webservice. Check Debug ouput window.");
//--Finally, Invoke the web service meth // od object wsvcClass = results.CompiledAssembly.CreateInstance(serviceName);
MethodInfo mi = wsvcClass.GetType().GetMethod(methodName);
return mi.Invoke(wsvcClass, args);
return null;
Confused | :confused: Confused | :confused:


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

GeneralGreat Post.. Pinmemberswitchez8-Sep-13 21:57 
Generalsmiley's PinmemberBassam Saoud19-Jan-10 13:34 

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